Right. Current idea with slight revision thanks to #Dungeonchat
Arnaud (2.0)
Citan (3.0)
Deis-2 (3.5)
Garnet (2.0)
FFT Priest (0.5)
Sealstone: Multitarget (typically equipped on Arnaud)
Basic idea: I was talking to Taishyr about the difficulty in finding people who want to use the Multitarget sealstone, thanks to the fact that it halves the effects of everything (often requiring some means of buffing to compensate). Then it hit me; WA4 statbusting is obscenely powerful. But ST in this situation.
Arnaud felt like a natural fit here. While Slow Down gets cut in power, it's still quite effective for cutting enemy speed, thanks to the intricacies of WA4's system. To boot, Illusion is still useful, cutting targets' HIT to 75% rather than halving; still quite effective. Both of these hit anything and everything not named Balgaine. He doesn't really care much for his damage anyway.
Deis...is Deis, bringing accurate ID and an inability to be pinned down by Silence, alongside her solid magic damage. Oh, and her buffs. Pwr.Up is insane to put on Citan for extra power, and let's not get into Death. It's BoF2 Death. Running on Deis stats. People die from it.
Citan brings lightning-fast offense to start, and can get ATK-up from Deis, turning him into a physical damage nightmare. He also acts as a secondary healer, and later a haste-buffer, using Senkei to no small effect if he's allowed two turns. His speed is definitely notable, however, and is formidable post-Senkei. That's if the team gets that far.
Garnet...okay. I'll admit that Snow suggested her. I'm guessing FF9 equips+summons+healing, mainly. And has revival. Yay revival.
FFT Priest felt like a good 0.5 healer/reviver to throw in. Revival in a pinch, and later on, if the extra damage is justified and there isn't healing or buffing to do, Holy. Resources relegate her to secondary, though.